標準號：ISO 5282-1982
中文標準名稱：芳香烴 硫含量的測定 皮特-魯普雷克特還原和分光光度法
英文標準名稱：Aromatic hydrocarbons; Determination of sulphur content; Pitt-Ruprecht reduction and spectrophotometric method
標準類型：G15
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G15
國際標準分類號：71.080.15
適用范圍：Relates to products boiling below 200 鳦. Directly applicable to contents of 0.1 mg/kg to 30 mg/kg. Higher contents may be determined by a suitable dilution of the sample. Alkylsulphones, arylsulphonic acids and arylsulphonates give incomplete recovery of sulphur. Reduction of the sulphur compounds to nickel sulphide with Raney nickel. Stripping of the hydrogen sulphide in hydrochloric acid medium and absorption in an alkaline zinc acetate solution. Formation of methylene blue with N,N-dimethyl-p-phenylenediamine sulphate and iron(III) ammonium sulphate. Determination of the absorbance of the blue coloured solution at a wavelength of 667 nm.